The only sour note has been stru

The only sour note has been struck by new energy tax 【proposals】 in the US and the EC.
A、introductions
B、destinations
C、accommodations
D、suggestions
【正确答案】：D
【名师解析】:在题目中提到的"The only sour note has been struck by new energy tax proposals in the US and the EC"这句话中，"sour note"是一个比喻，表示不和谐或不愉快的因素。而紧随其后的"proposals"指的是提出的建议或计划。因此，根据句子的语境，"proposals"与"suggestions"意义相近，都表示提出的建议或提议。选项A "introductions"（介绍）, 选项B "destinations"（目的地）, 选项C "accommodations"（住宿）都与题目中的"proposals"不符。所以正确答案是选项D "suggestions"（建议）。